Tunable diode laser study of the nu(3) band of oxirane

We have measured and fitted over 600 well-resolved lines in the v(3) ring breathing band of oxirane. The spectrum is accurately reproduced by previously determined rotational and centrifugal distortion constants for the ground state, together with newly determined rotational, quartic and some sextic distortion constants for the upper state. The magnitudes of the distortion constants reveal some evidence of Coriolis interactions with nearby states. The band centre was determined as 1270.370468(88)cm(-1). (C) 2002 Elsevier Science (USA). All rights reserved.